Zaxcom VTX1

VTX1 is the next evolution in IFB transmission combining two types of frequency bands and enhanced features including encrypted audio, timecode, internal recording, and remote capabilities all in one device, making it the most versatile IFB system for any project.

TWO FREQUENCY BANDS ARE BETTER THAN ONE VTX1 is engineered to transmit both VHF and 2.4 GHz frequency bands for ultimate performance.

The VHF turning range is 192-217 MHz with a 25 kHz RF frequency step. VHF offers two user-selectable operating modes: FM analog and a fully encrypted 100% digital modulation mode. No matter which mode, VTX1 transmits high quality audio to VHF compatible devices including the Zaxcom VRX1.

With its 2.4 GHz frequency band, VTX1 features ZaxNet giving users the ability to send IFB audio, timecode, metadata, and remote control Zaxcom compatible transmitters and receivers.

Through ZaxNet, remote adjustments can be made to the frequency, pre-amp gain, transmitter output power, and put the unit in record, playback, or stop modes " eliminating the need to approach the talent to adjust the device. Better yet, ZaxNet transmits over a single 2.4 GHz RF channel which can be used license-free in almost any country.

COMPATIBILITY VTX1 is compatible with the Zaxcom VRX1 receiver in VHF FM analog or digital modulation modes.

VHF FM analog audio is also compatible with Comtek receivers and other products operating in the 192-217 MHz frequency range.

Known compatibility: • Comtek BST 75-216 • Comtek BST 25-216 • Comtek M-216

ENCRYPTED AUDIO The VHF digital modulation mode and 2.4 GHz audio is fully encrypted, keeping transmissions private and secure.

The VHF FM analog mode does not provide encrypted audio.

INTERNAL RECORDING Audio can be simultaneously transmitted and internally recorded to a memory card that includes timecode. A microSD card slot allows audio to be recorded directly onto the instantly removable card as a backup or reference for post.

Files are recorded using MARF (Mobile Audio Recording Format), a lossless fault-tolerant recording system that eliminates file corruption common to recordings caused by power loss or early card removal.

INPUTS A TA5 audio input offers a balanced stereo line level or sample rate conversion AES. The BNC connector provides a timecode input while the USB input allows for software updates.

TRANSMISSION POWER Maximum RF power output is 50 mW in either VHF operating modes and 2.4 GHz.

POWER VTX1 can be powered externally via Hirose connector and accepts 8 to 18 VDC @ 180 mA.

Dual Frequency Transmission

Transmits over both VHF and 2.4 GHz bands for maximum flexibility and performance.

Encrypted Audio Options

Offers fully encrypted audio in digital VHF and 2.4 GHz modes for secure transmissions.

ZaxNet Remote Control

Adjust settings like frequency, gain, and power remotely without needing to access the device directly.

Integrated Timecode Support

Sends and receives timecode over 2.4 GHz for perfect sync across devices.

Internal Audio Recording

Simultaneously records high-quality audio to a removable microSD card with timecode for backup or post use.

Versatile Compatibility

Works with Zaxcom VRX1 and Comtek receivers using VHF FM analog mode.

One Device, Multiple Modes

Supports both FM analog and digital modulation, switchable based on project needs.

Secure and Reliable Recording

Uses a fault-tolerant format to prevent audio file corruption due to power issues or card removal.

Remote Workflow Integration

Allows full control of compatible transmitters and receivers via ZaxNet, streamlining production setups.

Simple Connectivity

Includes balanced stereo audio input, timecode input, and USB for updates.

Includes balanced stereo audio input, timecode input, and USB for updates.

General Specifications:

• VHF Transmitter

• RF Modulation: Proprietary Digital Method (ZHD64) or FM

• Emission Designator: 180 KV2E

• FCC Compliance: Part 74 and Part 95

RF Specifications (VTX1):

• Frequency Range: 192"217 MHz

• Frequency Step: 25 kHz

• RF Bandwidth (ZHD Mode): 64 kHz

• RF Bandwidth (FM Mode): 25 kHz

• Channel Separation (ZHD Mode): 300 kHz

• Channel Separation (FM Mode): 200 kHz

• RF Power Output: Max 50 mW

• Antenna Connector: 50 Ω SMA Female

Audio Specifications:

• Dynamic Range: 114 dB

• Total Harmonic Distortion: 0.02%

• Frequency Response (Mode 0): 20 Hz to 16 kHz

• System Group Delay: 9 ms

• Audio Input Connector: TA5 Male

• Analog Input Range: -10 to +4 dBu

• Analog Input Type: Balanced Line Level

• Audio Input Impedance: 4.7 kΩ

• ADC Bit-Depth: 24-bit

• ADC Sampling Rate: 32 kHz

• AES Input: Balanced with Sample Rate Conversion

• Input Sample Rate Range: 32 kHz to 96 kHz

Timecode Specifications:

• Clock Accuracy: 1.54 PPM (1 Frame Out in 6 Hours)

• Timecode Type: SMPTE

• Timecode Frame-Rates: 23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF

Internal Recording Specifications:

• Media: MicroSD Card (Flash Memory)

• File Format: .ZAX

• Recording Time: 96 Hours (16 GB Card)

2.4 GHz ZaxNet Transmitter:

• RF Frequency Range: 2.403 to 2.475 GHz

• RF Modulation: Digital Spread Spectrum

• RF Frequency Step: 1 MHz

• RF Bandwidth: 1 MHz

• Channel Separation: 2 MHz

• Sensitivity: -96 dBm

• RF Power Output: 50 mW

Physical / Power Specifications:

• Weight: 7.3 oz

• Dimensions (H x W x D): 1" x 3.55" x 3.23"

• Display: Graphic OLED

• External Power: 8 to 18 VDC @ 180 mA

• Power Connector: Hirose

• Internal Power: N/A

• Power Consumption: 2.13 watts

• Note: Power measured pre-output band-pass filter